ARCHIVED - 4.5.5.6.(1)

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4.5.5.6.(1)


Objective	OS1 Fire Safety
Attribution	(a) [F82-OS1.1] (b) [F80-OS1.1]
Application	Application 1: Mechanical connections of underground piping systems that carry flammable liquids or combustible liquids and have no secondary containment. Application 2: This also applies to: vent piping material for aboveground and underground storage tanks containing flammable liquids or combustible liquids, as stated in Sentences 4.3.5.1.(1) and 4.3.10.2.(1), materials used for piping, valves and fittings for flammable liquid and combustible liquid installations on piers and wharves [not including marine fuel-dispensing stations], as stated in Sentence 4.8.4.1.(1), and piping for flammable liquids or combustible liquids at fuel-dispensing stations, as stated in Sentence 4.6.6.5.(6). Exceptions: except as exempted in: Sentences 4.1.1.1.(2) and (3), which apply to unique hazards at process plants, in transportation, for oil-burning equipment, on farms and isolated construction projects, and the storage of aerosol products, and Sentence 4.5.1.1.(2), which applies to: tubing or casings and piping for oil or gas wells, transmission pipelines, piping for vehicles, aircraft, watercraft and portable or stationary engines, piping systems in distilleries, and piping within the scope of the applicable provincial codes regulating boilers and pressure vessels.
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Intent	Intent 1: To limit the probability that piping defects or damage will go unnoticed, which could lead to appropriate measures not being taken, which could lead to the escape and spread of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to harm to persons. Intent 2: To limit the probability that premature corrosion will lead to failure of the piping, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.
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